Wall base



FIG. 1 is a perspective view of a wall base showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The wall base is shown with a symbolic break in its length. The appearance of any portion of the wall base between the break lines forms no part of the claimed design.

The surface shading shown in all figures are for illustrative environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a wall base, as shown and described. 